阅读说明：本技术 车门把手组件 (Vehicle door handle assembly ) 是由 A·林德 A·拉瓦尔 R·格勒努亚 T·斯梅里盖 A·格林 G·德普雷奥 于 2018-06-28 设计创作，主要内容包括：本发明涉及一种用于车门把手(1)的联接装置,该门把手具有把手杠杆(3),它能在它与门板(100)外表面齐平的齐平位置、它通过电动机(7)伸出并可由使用者抓握的就绪位置、其中预加载的推-推单元(13)被释放以在不致动电动机的情况下将把手杠杆置于就绪位置的向内咔哒位置之间移动,该联接装置包括：·连接到把手杠杆的杠杆轴(27)；·与杠杆轴旋转地联接的推-推杠杆环(29),它在将把手杠杆向内推到咔哒位置时经由推-推杠杆与推-推单元相互作用,从而释放预加载的推-推单元并将杠杆推到就绪位置；·与所述杠杆轴旋转地联接的联接齿轮(31),它与电动机相互作用以将把手杠杆从齐平位置移到就绪位置,其中,杠杆轴经由被杠杆轴支承并将杠杆轴和联接齿轮旋转地连结的联接机构旋转地联接到联接齿轮,所述联接机构构造成允许杠杆轴相对于联接齿轮在与把手杠杆的就绪位置和咔哒位置间的角向距离对应的角度范围内自由转动运动。(The invention relates to a coupling device for a door handle (1) of a vehicle, the door handle having a handle lever (3) which can be moved between a flush position in which it is flush with the outer surface of a door plate (100), a ready position in which it protrudes by means of an electric motor (7) and can be gripped by a user, an inward click position in which a preloaded push-push unit (13) is released to place the handle lever in the ready position without activating the electric motor, the coupling device comprising: a lever shaft (27) connected to the handle lever; a push-push lever ring (29) rotationally coupled with the lever shaft, which interacts with the push-push unit via the push-push lever when the handle lever is pushed inwards to the clicking position, thereby releasing the preloaded push-push unit and pushing the lever to the ready position; a coupling gear (31) rotationally coupled with said lever shaft, interacting with the electric motor to move the handle lever from the flush position to the ready position, wherein the lever shaft is rotationally coupled to the coupling gear via a coupling mechanism supported by the lever shaft and rotationally linking the lever shaft and the coupling gear, said coupling mechanism being configured to allow a free rotational movement of the lever shaft with respect to the coupling gear within an angular range corresponding to the angular distance between the ready position and the clicking position of the handle lever.)

1. Coupling device for a door handle (1) of a vehicle, the door handle (1) having a handle lever (3) movable between a flush position, in which it is flush with an outer surface of a door panel (100), a ready position, in which it is extended by an electric motor (7) and can be gripped by a user, and an inwardly-clicked position, in which a preloaded push-push unit (13) is released in order to bring the handle lever (3) in the ready position without actuating the electric motor (7), the coupling device comprising:

a lever shaft (27) which connects the handle lever (3) to the shaft,

a push-push lever ring (29) rotationally coupled with the lever shaft (27) and interacting with a push-push unit (13) via a push-push lever (30) when the handle lever (3) is pushed inwards to a click position, releasing the preloaded push-push unit (13) and pushing the lever (3) to a ready position,

-a coupling gear (31) rotationally coupled with the lever shaft (27) and interacting with the electric motor (7) to move the handle lever (3) from a flush position to a ready position,

wherein the lever shaft (27) is rotationally coupled to the coupling gear (31) via a coupling mechanism supported by the lever shaft (27) and rotationally coupling the lever shaft (27) to the coupling gear (31), the coupling mechanism being configured to allow a free rotational movement of the lever shaft (27) with respect to the coupling gear (31) within an angular range corresponding to an angular distance between the ready position and the clicking position of the handle lever (3).

2. Coupling device according to claim 1, characterized in that said lever shaft (27) comprises at least one radial track (35) on an axial portion (27b), said coupling gear (31) comprising at least one circular arc hole (39) housing said radial track (35), the angular opening of said circular arc hole (39) corresponding to the angular distance between the ready position and the clicking position of said handle lever (3).

3. Coupling device according to claim 2, characterized in that said lever shaft (27) comprises, on an axial portion (27b), two diametrically opposite radial tracks (35), and in that said reduction gear (31) comprises two diametrically opposite circular arc holes (39), of which said radial tracks (35) are freely movable between angular positions corresponding to the ready position and to the click position of said handle lever (3).

4. Coupling device according to any one of claims 1 to 3, characterized in that the push-push lever (30) is carried by a push-push lever ring (29) which is form-fitted with the first axial portion (27a) of the lever shaft (27).

5. Coupling device according to any one of the preceding claims, characterized in that the lever shaft (27), the coupling gear (31) and the push-push lever ring (29) are made of molded plastic.

6. Coupling device according to any one of the preceding claims, characterized in that the angular portion of the coupling gear (31) carrying the meshing teeth (33) so as to interact with the reduction mechanism (9) covers an angular portion of the coupling gear (31) greater than the sum of the angle from the clicking position to the ready position and the angle from the flush position to the ready position of the handle lever (3).

7. Coupling device according to any one of the preceding claims, characterized in that the angular portion of the coupling gear (31) carrying the meshing teeth (33) so as to interact with the reduction mechanism (9) covers an angular portion of the coupling gear (31) greater than twice the angle from the clicking position to the ready position of the handle lever (3).

8. Door handle, in particular for a vehicle door, having a handle lever (3) which can be moved between a flush position, in which it is flush with the outer surface of the door panel (100), a ready position, in which it protrudes through an electric motor (7) and can be gripped by a user, and an inwardly clicked position, in which a preloaded push-push unit (13) is released in order to bring the handle lever (3) into the ready position without actuating the electric motor (7),

the door handle includes:

a lever shaft (27) which connects the handle lever (3) to the shaft,

a push-push unit (13) with at least one preloaded spring (15) configured to bring the handle lever (3) from a click position in which said preloaded spring is released into a ready position without activating the motor (7),

-an electric motor (7) and a reduction mechanism (9) for transmitting a rotary motion from the electric motor (7) to the handle lever (3), the reduction mechanism comprising a coupling gear (31) whose rotation rotates the lever (3),

wherein the lever shaft (27) is rotationally coupled with the coupling gear (31) via a coupling mechanism supported by the lever shaft (27) and rotationally linking the lever shaft (27) and the coupling gear (31), the coupling mechanism being configured to allow a free rotational movement of the lever shaft (27) with respect to the coupling gear (31) within an angular range corresponding to an angular distance between the ready position and the clicking position of the handle lever (3).

9. The door handle according to the preceding claim, characterized in that the push-push unit (13) comprises two preloaded springs (15) which, when released, push a slider (19) which interacts via a protruding finger (21) with a push-push lever (30) radially protruding from the handle lever shaft (27).

10. The door handle according to claim 8 or 9, characterized in that the deceleration mechanism (9) comprises a worm drive which interacts with the coupling gear (31) in order to move the handle (3) when the electric motor (7) is actuated.

Technical Field

The present invention relates to a vehicle door assembly, particularly of the type having flush door handle levers.

Background

The door handle assembly includes an electric motor that, when actuated, moves the handle lever between the flush position and the ready position. In the flush position, the handle lever is flush with the outer surface of the door body. In the ready position, the handle lever protrudes from the outer surface so as to be graspable by a user.

Once the user grasps the handle lever in its ready position, he can unlock the door by pulling the lever into a further protruding unlocking position, in which the handle lever interacts with the latch mechanism (by means of a bowden cable, a swivel pin or a gear mechanism) and unlocks the door.

When the user releases the handle lever, the handle lever spring brings the handle lever back to its ready position. The electric motor can also move the handle lever from the ready position to the flush position after opening or closing the door.

Such door handle assemblies also include a backup mechanism to enable the door to be opened in the event of, for example, a failure of the motor or the vehicle battery (that is, when the motor cannot be actuated). The mechanism comprises for example a push-push mechanism, wherein the user pushes the handle lever inwards from its flush position until a click position is reached, in which the pre-loaded spring is released. The preloaded spring, when released, urges the handle lever from the inwardly-clicking position to the protruding ready position.

Once the user approaches/operates the vehicle in the backup mode, the battery will typically be recharged, and/or the motor failure will be relieved and normal electric actuation may be resumed.

In normal operation, the electric motor brings the handle lever into motion via a reduction mechanism, such as a worm and gear mechanism, which reduces the rotational speed of the motor actuation while increasing the torque value. The reduction mechanism is actuated in reverse when the user pushes the lever from the flush position to the click position.

Another problem caused by the irreversibility of the actuation is observed when the user opens the door at a faster speed. In particular, the user pulls the lever in the open (extended) position to cause opening of the door. Once the door panel reaches the fully open position, the user will stop the movement of the door panel by pushing the handle lever to stop the movement.

This reversal of force causes the lever to be quickly driven from the open position back to the ready or flush position. During this movement, the deceleration mechanism may be actuated in reverse, possibly at high moving speeds.

In the event of irreversible reversibility due to increased friction due to temperature, the resulting reverse actuation may cause the deceleration mechanism to break down or even break, thereby potentially compromising the operation of the entire door handle both when the door is manually backed up and when normal power actuation is resumed (e.g., after recharging the battery or removing the motor from failure).

Disclosure of Invention

In order to overcome the above-mentioned drawbacks, the object of the present invention is a coupling device for a door handle for a vehicle, having a handle lever which is movable between a flush position, in which it is flush with an outer surface of a door panel, a ready position, in which it is extended by an electric motor and can be gripped by a user, and an inwardly click position, in which a preloaded push-push unit is released in order to place the handle lever in said ready position without actuating the electric motor,

the coupling device includes:

a lever shaft, which is connected to the handle lever,

a push-push lever ring, which is rotationally coupled with the lever shaft, interacts with the push-push unit via the push-push lever when the handle lever is pushed inwards to the click position, thereby releasing the preloaded push-push unit and pushing the handle lever to the ready position,

a coupling gear rotationally coupled with the lever shaft, which interacts with the electric motor to move the handle lever from the flush position to the ready position,

wherein the lever shaft is rotationally coupled to the coupling gear via a coupling mechanism supported by the lever shaft and rotationally linking the lever shaft and the coupling gear, the coupling mechanism being configured to allow a free rotational movement of the lever shaft relative to the coupling gear within an angular range corresponding to an angular (angular) distance between a ready position and a clicking position of the handle lever.

The relative free rotational movement allows to selectively disengage the lever and the reduction stage when the user pushes the lever into the clicking position and when the push-push unit pushes the lever into the ready position.

The coupling device may have one or more of the following features taken individually or in combination:

the lever shaft comprises at least one radial track on an axial portion, the coupling gear comprising at least one circular arc hole housing the radial track, the angular opening of the circular arc hole corresponding to the angular distance between the ready position and the clicking position of the handle lever.

The lever shaft comprises, on an axial portion, two diametrically opposite radial tracks and the reduction gear comprises two diametrically opposite circular arc holes in which the radial tracks can move freely between angular positions corresponding to the ready position and the clicking position of the handle lever.

The push-push lever is carried by a push-push lever ring that is form-fitted with the first axial portion of the lever shaft.

The lever shaft, the coupling gear and the push-push lever ring are made of molded plastic.

The angular portion of the coupling gear with meshing teeth to interact with the reduction mechanism covers an angular portion of the coupling gear greater than the sum of the angle of the handle lever from the clicking position to the ready position and the angle from the flush position to the ready position.

The angular portion of the coupling gear with meshing teeth to interact with the reduction mechanism covers an angular portion of the coupling gear that is greater than twice the angle from the clicking position to the ready position of the handle lever.

The invention also relates to a related door handle, in particular for a vehicle door, having a handle lever which is movable between a flush position, in which it is flush with the outer surface of the door panel, a ready position, in which it protrudes through the electric motor and can be gripped by a user, and an inward-clicking position, in which the preloaded push-push unit is released, placing the handle lever in said ready position without the electric motor,

the door handle includes:

a lever shaft, which is connected to the handle lever,

a push-push unit having at least one preload spring, which is configured to bring the handle lever from a click position, in which the preload spring is released, into a ready position without actuation of the electric motor,

an electric motor and a reduction mechanism for transmitting the rotary motion of the electric motor to the handle lever, the reduction mechanism comprising a coupling gear, the rotation of which rotates the lever,

wherein the lever shaft is rotationally coupled to the coupling gear via a coupling mechanism supported by the lever shaft and rotationally linking the lever shaft and the coupling gear, the coupling mechanism being configured to allow free rotational movement of the lever shaft relative to the coupling gear within an angular range corresponding to an angular distance between the ready position and the clicking position of the handle lever.

The push-push unit may comprise two preloaded springs which, when released, push a slider which interacts via a protruding finger with a push-push lever protruding radially from the handle lever shaft.

The reduction mechanism may include a worm drive that interacts with the coupling gear to move the handle lever when the motor is actuated.

Drawings

Other features and advantages of the invention will become apparent upon reading the following description of the drawings, given by way of example and not by way of limitation, in which:

fig. 1 is a schematic cross-sectional view of a vehicle door, wherein the handle including the handle lever is shown in different positions,

figure 2 is a schematic view of the door handle,

figure 3 is a schematic view of the coupling mechanism of the handle of figure 2,

fig. 4 is an exploded view of the coupling device of the handle according to fig. 2 and 3, showing the cross-section of its main parts,

fig. 5a, 5b, 5c show different positions of the coupling device of fig. 4, illustrating the case of a push-push unit,

fig. 6a, 6b, 6c show different positions of the coupling device of fig. 4, showing the case of motorized actuation.

The same reference numbers will be used throughout the drawings to refer to the same or like elements.

Although the drawings refer to specific embodiments of the invention, other embodiments may be obtained by slightly combining or modifying the illustrated embodiments, and the new embodiments are also within the scope of the present invention.

Detailed Description

Fig. 1 shows a series of schematic cross-sectional views of a vehicle door panel 100 with a built-in door handle 1. The door panel 100 forms the outer surface of the vehicle, the door handle 1 being represented mainly by its handle lever 3 (the part intended to be grasped by the user and moved) and by the handle frame 5 (the part remaining stationary during actuation).

The terms "inboard", "outboard" and equivalent terms are defined with respect to the interior and exterior of the vehicle.

In the first sectional view of fig. 1, the handle lever 3 is in a flush position. In the flush position, the outer surface of the handle lever 3 is flush with the door panel 100. The flush position is adopted when the vehicle is running and when the vehicle is parked for a long time. In the flush position, the handlebar lever 3 is less likely to interact with an accidental or non-existent passer-by when parked, and reduces air resistance when driving. In the flush position, the handle lever 3 also appears to be integrated in the door panel 100 in a visually pleasing and discrete manner.

In the second sectional view of fig. 1, the handle lever 3 is in the ready position. In the ready position, the handle lever 3 has been rotated outwardly about the handle axis a by a predetermined angle (e.g. 20 ° to 45 °) so as to be graspable by the user. The ready position is assumed when a user approaches the vehicle or causes the door to unlock, for example using a remote control integrated in a key or RFID security token. In this position, the handle lever 3 is available and graspable for the user, but the handle is still locked.

In the third sectional view of fig. 1, the handle lever 3 is in the open position. The handle lever 3 has been rotated further outwards (40 ° to 60 ° or more) by the user than in the ready position and interacts with the latch mechanism to unlock the door, so that the door is unlocked and ready to be opened by pulling the handle lever 3 further.

In case of a mechanical or electrical failure of the mechanism driving the lever 3 from the flush position to the ready position, the user may push the lever 3 inwards with respect to the door panel 100 by applying an inwardly directed pressure P on the handle lever 3, as shown in the fourth cross-sectional view of fig. 1. The handle lever 3 is then in a position referred to herein as the click position, in which the mechanical interaction ("click") releases the spring of the push-push unit, which drives the lever 3 in the ready position without actuation of the motor.

Fig. 2 is a view of the door handle 1 as seen from the inside. In fig. 2, the handle lever 3 is rotatably movable relative to a handle frame 5, which handle frame 5 is intended to be attached to the inner surface of the vehicle door panel 100. The frame 5 comprises a housing for most of the components of the door handle 1.

The motor 7 with the speed reduction mechanism 9 is located in the housing of the frame 5. The electric motor 7 is started by the injection of a current, in particular from the vehicle battery. The speed reduction mechanism 9 accommodates the rotational output motion of the motor 7 by reducing the rotation speed and increasing the torque value. The deceleration mechanism 9 moves the handle lever 3, in particular from the flush position to the ready position.

The reduction mechanism 9 comprises, for example, one or more reduction stages with reduction gears and/or a worm and gear system.

The speed reducing mechanism 9 moves the coupling device 200. The coupling device 200 comprises a lever base 11, to which lever base 11 a handle lever body (not shown) is attached when assembling the handle 1 to obtain an assembled handle lever 3.

The frame 5 also houses a push-push unit 13, the push-push unit 13 comprising two push-push springs 15 placed around two guide rods 17. The push-push spring 15 pushes the slider 19 when released, the slider 19 carrying a protruding finger 21, the finger 21 abutting against the push-push lever 30 of the coupling device 200. Said projecting fingers 21 are in particular made of rubber, soft plastic or any damping material.

The spring 15 and the guide bar 17 are placed on both sides of a release mechanism 23, which release mechanism 23 then releases the slider 19 when compressed (click position), which slider 19 is then pushed by the spring 15 along the guide bar 17, thereby pushing the handle lever 3 in the ready position.

The rotational position of the handle lever 3 is detected by a positioning means 25 on the underside of the coupling means 200. The positioning means 25 comprise a magnetic pointer and a magnetic sensor (for example a hall effect sensor). The magnetic pointer rotates with the coupling device 200 and the handle lever 3, and then the magnetic sensor determines the rotational position of the magnetic pointer, thereby determining the position of the handle lever 3.

Fig. 3 is a view of the coupling device 200 taken out of the frame 5.

In fig. 3, the coupling device 200 includes a lever base 11, and in particular surrounds a lever shaft 27 extending axially from the lever base 11. It comprises two axial portions 27a, 27b corresponding to a push-push lever ring 29 and a coupling gear 31, which in the assembled state of the coupling device 200 cover one of the axial portions 27a, 27b, respectively.

A push-push lever ring 29 is axially and rotatably coupled to the lever shaft 27 and comprises push-push levers 30 extending radially from a form-fitting annular body.

The coupling gear 31 comprises on a portion of its outer cylindrical wall meshing teeth 33.

Fig. 4 is an exploded view of the coupling device 200 including the lever shaft 27, the push-push lever ring 29 and the coupling gear 31.

The lever shaft 27 comprises two axial portions 27a, 27b, respectively, which are surrounded by the push-push lever ring 29 and the coupling gear 31, respectively, when the coupling device 200 is assembled.

The first axial portion 27a is initially situated at the handle lever base 11 and has four radial tracks 35 which interact with form-fitting cross-shaped holes in the push-push lever ring 29. The second axial portion 27b has two radial tracks 35 which are two opposite extensions of the radial tracks 35 of the first axial portion 27 a.

The coupling gear 31 includes a gear body having an axial hole formed therein. The holes include a central circular hole 37 and two circular arc-shaped holes 39 extending on diametrically opposite sides of the central circular hole 37.

The angular arc opening of the circular arc hole 39 is at least equal to the angular distance between the clicking position and the ready position of the handle lever 3 (or the handle lever base 11). The angular arc opening of the holes 39 is in particular between 30 ° and 150 °.

A lower angular opening value (about 30 °) corresponds to an embodiment in which the free rotational movement of the lever shaft 27 and the coupling gear 31 is equal to the angular distance between the clicking position and the ready position of the handle lever 3. The circular arc shaped hole 39, having a more pronounced angular opening value (greater than 90 deg.), is shown to dissipate the kinetic energy generated at the end of the movement during the rapid opening of the door panel 100.

The coupling gear 31 and the lever shaft 27 and its radial track 35 form a coupling mechanism supported by the lever shaft 27, which rotatably couples the lever shaft 27 and the coupling gear 31. Said coupling mechanism is configured to allow a free rotational movement of the lever shaft 27 with respect to the coupling gear 31 within an angular range corresponding to the angular distance between the ready position and the clicking position of the handle lever 3.

Also shown in fig. 4 are axial cross-sectional views of the axial portions 27a, 27b and the push-push lever ring 29 and the coupling gear 31.

Fig. 5a, 5b and 5c show push-push actuation in case of a power failure (battery depletion or failure, failure of the motor 7).

The figure is a schematic axial view of the coupling device 200 of fig. 4, as viewed from the axial end opposite the handle lever base 11. The coupling device 200 is viewed along axis a so that only the radial surfaces of the coupling gear 31 and the handle lever shaft 27 are visible together with the push-push lever 30.

The push-push lever 30, the lever shaft 27 and the handle lever 3 are rotatably coupled: due to the form fit between the lever shaft 27 and the push-push lever ring 29, neither can rotate without the other rotating.

In fig. 5a, the handle lever 3 is in a flush position. The lever shaft 27 and the coupling gear 31 are in a relative position in which the radial track 37 is in a non-extreme position inside the circular arc hole 39: they do not abut against one of the radial walls of the circular arc shaped hole 39. The push-push unit 13 (schematically represented by one of its springs) is in its preloaded, unreleased ("armed (ready to go, arm)").

In fig. 5b, the user presses against the handle lever 3, causing the lever shaft 27 and thus the push-push lever 30 to rotate, so as to reach a click position in which the push-push unit 13 is further compressed and released. In fig. 5b, the radial extensions of the lever shafts 19 abut against one of the radial walls of their respective circular arc shaped holes 39. In both fig. 5a, 5b, the reduction gear 31 is in the same rotational position.

In fig. 5c, the released push-push unit 13 pushes the push-push lever 30 and, in turn, the handle lever 3 until the ready position is reached. In the ready position, the push-push lever 30 is pushed past its position of fig. 5a (dashed outline corresponding to the flush position) and the radial tracks 35 abut against the other radial wall of their respective circular arc-shaped hole 39.

The coupling gear 31 is not shown in motion in any of fig. 5a, 5b, 5 c. The lever shaft 27 is freely rotationally movable between the ready position and the click position with respect to the coupling gear 31. In particular, the angular opening of the circular arc hole 39 corresponds at least to the angle of rotation of the handle lever 3 between the ready position and the clicking position.

Fig. 6a, 6b and 6c show the effect of the electric motor 7 on the coupling gear 31 and the handle lever shaft 27, e.g. during normal actuation when an approaching user has been detected.

Fig. 6a is an illustration of the coupling device 200 with the handle lever 3 in the flush position, so that fig. 6a is identical to fig. 5 a.

The motor 7 causes rotation of the coupling gear 31. During a first part of said rotation, the coupling gear 31 moves without moving the lever shaft 27, in particular until the radial track 35 abuts against the radial wall of the circular arc hole 39. This situation is shown in fig. 6 b. The total angular range within which the lever shaft 27 can rotate without applying a significant torque to the reduction gear 31 corresponds to the angular opening of the circular arc hole 39, that is to say at least equal to the angle between the ready position and the click position of the lever 3.

Further rotation of the coupling gear 31 causes said gear 31 to exert a torque on the radial track 35 and thus on the lever shaft 27, which in turn moves the lever shaft 27 until the ready position shown in fig. 6c is reached.

In all fig. 6a, 6b, 6c, the push-push unit 13 does not move and remains preloaded and constrained by the release mechanism 23.

In order to achieve both movements in fig. 5a, 5b, 5c and 6a, 6b, 6c, the angular portion of the coupling gear 31 carrying the meshing teeth 33 to interact with, for example, the worm wheel of the reduction mechanism 9 must cover an angular portion of the coupling gear 31 greater than the sum of the angle from the clicking position to the ready position (to overcome the limited free movement of the coupling gear 31 with respect to the lever shaft 27) and the angle from the flush position to the ready position (to cover the actual movement of the lever shaft 27 when in movement).

In case of a malfunction of the vehicle battery, e.g. due to a prolonged parking or a turning on of the front headlights, the user will initiate a push-push actuation as shown in fig. 5a, 5b, 5c by releasing the push-push unit 13.

Furthermore, in order to be able to return automatically to the pre-loaded and restrained ("armed") state of the push-push unit 13, the electric motor 7 must be able to return the handle lever 3 from the flush position to the click position. In order to achieve automatic rearming of the push-push unit 13, the angle of the coupling gear 31 with the meshing teeth 33 is greater than the sum of the previously discussed angle (angle from the clicking position to the ready position plus angle from the flush position to the ready position) and the angle (absolute value) from the flush position to the clicking position.

The sum of said angles is equal to twice the angle from the clicking position to the ready position.

The coupling device 200, the lever shaft 27, the coupling gear 31 and the push-push lever ring 29 may be entirely made of molded plastic material.

The present invention allows to selectively decouple (decouple) the movements related to the electric power preparation using the electric motor 7 and the movements related to the backup actuation using the push-push unit 13. The reduction stage and its gears and worm screws can then only be optimized for the transmission of motion and torque from the electric motor 7 to the lever shaft 27, without taking into account the possible speed reduction of the reverse motion from the lever 3 to the electric motor 7.

Compared with a reversible reduction mechanism, the irreversible reduction mechanism has higher temperature bearing capacity, requires lower precision for machining parts, and is subjected to much less stress and wear, thereby having larger tolerances in part size and conceptual design.

The movement of the lever 3 without the movement of the reduction gear also results in a reduction of the resistance and noise, which are undesirable for the user and are indicative of a lower quality.

Thus, the present invention makes the door handle 1 stronger and potentially cheaper, while improving the overall perceived quality.